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a galaxy cluster in ursa major has a recessional velocity of 15000 kms using 73 kmsmpc for hubbles constant find the
two containers call them a and b with the same initial volume v47l hold the same amount of monatomic ideal gas say
how much electrical energy is needed to heat the water in a hot water heater with a capacity of 40 gallons from 60degf
calculate the overall efficiency to produce light in a fluorescent lamp from electrical energy derived from a nearby
anbsp40-kg child runs at 8 msa calculate the childs kinetic energyb if the child could convert all of the kinetic
an antacid tablet weighing 0949 g contained calcium carbonate as the active ingredient in addition to an inert binder
a record on a turn table rotates with initial speed 35 rads making three turns before stoppinga what is its angular
an engine takes 5 seconds to go from its idling speed of 600 revmin to 1200 revmina what is its angular accelerationb
a vinyl record 30cm in diameter turns through an angle of 200 degrees how far does a point on the edge of the record
during one compression stroke process in an engine 030 moles of air a diatomic ideal gas are compressed adiabatically
a power plant is designed to generate 80 mw of work 980x106nbspjs the plant is powered by steam at 765k with the
what is the efficiency of an engine that has 2200 j of heat added during combustion and loses 1000 j of heat in the
you walk on level ground 05 km east then 2400 m south and then climbs to the top of a building that is 1850 m tall what
a 840 kg girl lowers herself to the ground from a height of 86 m by holding onto a rope running over a pulley to a 300
pilots and astronauts are tested for the stresses of flying high-speed aircraft in a spinning human centrifuge a device
the coefficient of friction kinetic between a rubber tire and a wet concrete road is 05a find the minimum time in which
if an athlete uses 4424 joules to lift a box in 2frasl3 of a second how much power is he out putting in watts if he
volcanoes emit much hydrogen sulfide gas h2s which reacts with the oxygen in the air to form water and sulfur dioxide
an object of mass m1 and velocity v1 undergoes an elastic head on collision with another object of mass m2 that is rest
what gravitational force does a 1000 kg lead ball exert on an identical ball that is 3m
a 50 kg box is suspended by a rope from the ceiling if a horizontal force of 20 lb is applied to the box what angle
kevin joe and nick are studying for their physics exam but they are very confused about momentum conservation a reading
your moving car contains a lot of energy as kinetic energy - energy of motionif your car is not a hybrid when you stop
comment on what you think drives a scientist like stephen hawking to ask whyhow has hawkings research contributed to
one way to tune a piano is to strike a tuning fork which emits note of frequency 261626 hz then immediately strike the